Journal of South China University of Technology (Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (4): 115-120.doi: 10.3969/j.issn.1000-565X.2011.04.021

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Experimental Investigation and Mathematical Modeling of Solar Drying Equipment

Li Bian-sheng  Shen Xiao-xi  Liu Wei-tao   

  1. School of Light Industry and Food Sciences,South China University of Technology ,Guangzhoa 510640,Guangdong,China
  • Received:2010-06-21 Revised:2010-12-08 Online:2011-04-25 Published:2011-03-01
  • Contact: 李汴生(1962-)，男，博士，教授，主要从事食品加工和保藏研究 E-mail:shenxiaoxi1214@foxmail.com
  • About author:李汴生(1962-)，男，博士，教授，主要从事食品加工和保藏研究
  • Supported by:

    粤港关键领域重点突破项目(2006A25001004)；华南理工大学国家级轻工与食品实验教学示范中心建设项目(x2qs-y100030)

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Abstract:

The natural convective drying of Ganshimei（intermediate moisture salted plum） was performed using the self-designed small-size solar drying equipment,and the corresponding experimental parameters were detected.Then,the material and energy consumption of the drying system were calculated.Finally,a mathematical model describing the natural convective drying was put forward by changing the effective solar radiant energy per unit.The results show that the natural convective drying using the designed equipment,whose drying efficiency is 61.60%,is of a time cost of 14h,which is only 28.0% of that of the traditional sun drying;and that the proposed model accords well with the experimental results,with a relative deviation being less than 1%.This paper provides the theoretical basis for the application of solar drying equipment and for the quality prediction and drying condition control of Cantonese-style preserved fruits.

Key words: solar energy, drying equipment, convective drying, energy-balancing calculation, drying efficiency, drying model